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Abstrakt

Fine equiaxial grain structure is a consequence of designing a material with a large contribution of intermetallic compounds of certain size and distribution. A 2XXX alloy with Fe, Ni, Mn and Zr additions was cast obtaining large amounts of Al-Fe-Ni and Al-Cu-Mg precipitates, in which the Al-Zr compounds appeared as dispersoids. After the application of a modified thermomechanical procedure, an alloy with average grain size of 12 μm with a large contribution of grains smaller than IO μm has been obtained. Apart from that, elongated precipitates of0.8-4.0 μmin size as well as globular ones about 0.3 urn large were produced in the alloy after recrystallization. The alloy revealed high resistance to grain growth at high temperatures, which was due to the appearance of intermetallic compounds (mostly Al-Fe-Ni) in grain boundaries.
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Autorzy i Afiliacje

Janusz Król
Marta Tałach-Domańska
Maria Socjusz-Podosek

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